Window ventilator



6. F0 I ARENT WINDOW ,VENTILATOH Filed March 8, 1927 iNVENTOR harl'es FParenz ATTORN .Patented Aug. 14, 1928.

UNITED STATES CHARLES F. PAREN'LOF TCRRINGTON, CONNECTICUT.

WINDOW VENTILATOR.

Application filed March 8, 1927. Serial No. 173,671.

This invention relates to window ventilators, and more particularly to a ventilating device adapted to rest upon the sill of a window frame underneath a window sash.

One object of this invention is to provide a ventilator of the above nature having adjustable means for automatically varying the rate of flow of fresh air into a room according to the velocity of the wind blowing against the ventilator.

A further object is to provide a ventilator of the above nature adapted to prevent rain, snow, or other forms of moisture, as well as dust, insets, etc. from entering the house.

A further object is to provide a device of this nature which will be simple in construction, inexpensive to manufacture, easy to install and manipulate, compact, ornamental in appearance, and very efficient and durable in use.

\Vith these and other objects in view there has been illustrated on the accompanying drawings one form in which the invention may be conveniently embodied in practice.

Fig. 1 represents a perspective view of the ventilator.

Fig. 2 is a transverse sectional view of the same.

Referring now to the drawings in which like referencenumerals denote corresponding parts throughout the several views, the numeral 10 indicates a sill of a window frame having a horizontal inside portion 11 and a downwardly inclined outside portion 12. The horizontal portion 11 is located in i a plane above the inclined portion 12 form ing a shoulder 13 which is adapted to form a seat for a depending strip 14 in the bottom wall 15 of a ventilator casing, said strip 14 serving to prevent moisture from entering the house under the casing.

The ventilator casing comprises a vertical front wall 16, a pair of vertical side walls 17 and 18, and the horizontal bottom wall 15 previously mentioned, said walls being secured together in any suitable manner as by dovetailing. The under surface 19 of the bottom wall 15 is made horizontal for engagement with the inside portion 11 of the sill, while the upper surface 20 of said bottom wall is inclined rearwardly and clownwardly to permit any moisture which may enter the ventilator to drain off upon the outside member.

The side walls 17 and 18 of the ventilator casing extend outwardly beyond the rear edge of the bottom wall 15 and are provided in their upper edges with inclined recesses 21 for receiving the inclined bottom of the sash 22, as shown in Fig. 2. Immediately inside the recesses 21, provision is made of a downwardly extending strip 23 which extends between and is connected with the side.

walls 17 and 18.

In order to prevent dust and insects from entering the house through the ventilator, the horizontal rectangular frame formed by the front wall 16, side walls 17, and 18, and the strip 23 is covered by a. rectangularscreen 21 held in place by moldings 25, 26,

In order to permit the entrance of air to the body of the ventilator and to deflect rain or other forms ofnioisture which may pressure of the wind blowing against the outside of the ventilator exceeds a certain amount and to automatically diminish the air passage in the ventilator when the wlnd is at a lower velocity, provision is made of a swinging shutter 31, said shutter being pivoted on a rod 32 journaled in the side members 17 and 18 near the top of the ven- The rear edge of the 27, and 28, as clearly shown in Figs. 1 and 2.

tilator. The lower portion of the swinging shutter 31. is preferably tapered as shown and is considerably longer and heavier than the upper untapered portion 34 thereof.

By means of this construction, the weight of the lower portion 33, in theabsence of wind, will normally maintain the swinging shutter in the vertical position shown by the dotted lines in Fig. 2. hen, however, the wind reaches acertain predetermined vel0city, the shutter will swing against the action of gravity to the position shown in full lines in Fig. 2. Under such conditions, the extremity of the tapered lower portion 33 will engage a cushion strip 35 mounted in a V-slot 36 located in the rear of the front wall 16, while at the same time the eXtrem ity of the short upper portion 34; of the swinging shutter 31 will engage a cushion strip 37 located in a V-slot38 of the depending rear strip 23.

In order to vary the normal open position of the shutter 31, provision is made of an adjusting set-screw 39 mounted in a threaded plates 10 secured in the front wall member 16 in any suitable manner, as by screws In operation, when the set-screw 39 is moved rearwardly, it will engage the'upper portion 34 of the swinging shutter 31 and moveit ina clockwise direction to any desired adjusted position. Under these con- .ditions the vamount of air which can norimally enter through the ventilator will be reduced. It will be understood that the air passagethrough the ventilator may be com' pletelyclosedvby moving the set-screw 89 rearwardly as far as it will go.

In order to prevent the shutter 31 from beingncompletely closed by the pressure of the wind, so as to allow a small amount of ventilation to take place at all times, provisionis made of an auxiliary set-screw 42 I located below the set-screw 39 and also passingthrough the threaded plate 40. As will be evident, when theset-screw 4-2 is moved rearwardly from the position shown in Fig. 2, it willbe impossible for the wind to completely close the ventilator at any time and the amount of ventilationwill thus be determined by the position of the sot-screw 42.

order to permit the ventilator to be used upon various sizes of windows, provir sionisimade of an adjustable end member consisting of a plate 43 having a vertical flange 44 adapted to be secured to the side Wall 17 in any suitable manner, as by screws. The plate 43 has its upper and lower ends 45 :v and 46 bentdownwardly and upwardly respectively' to form guideways fora vertical 40 stripi47. The strip 47 has its outer end loopedto form a rib 48 for engaging the edge. of the window frame, and the edge of said strip 47 is provided with apertures 49 for receiving suitable screws for attaching said strip 47 to the edge of said window frame.

\Vhile' there has been disclosed in this specification one form in which the invention may be embodied, it is to be understood that this form is shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosure but may he modified and embodied in various other forms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new, and for which it is desired to secure Letters Patent, is:

1. In a window ventilator, a, casing adapted to rest on a window sill below a raised window sash, said casing having an air inlet and an air outlet, and a pivoted shutter in said casing responsive to wind- 'n'essure for automatically swinging inwardly to automatically reduce the air passage therethrough, and means for adjusting the limit of said swing.

52. In a window ventilator, a casing adapted to rest on a window sill below a raised window sash, said casing having an air inlet and an air outlet, an ecccnt-rieally pivoted shutter in said casing responsive to windpressure for automatically swinging inwardly to automatically reduce the air passage therethrough, the weight of said shutter tending to swing it outwardly, and means to adjustably limit the swing of said shutter in both directions.

CHARLES F. PARENT. 

